基于粒子群算法的結(jié)構(gòu)損傷檢測

1、華中科技大學(xué)碩士學(xué)位論文基于粒子群算法的結(jié)構(gòu)損傷檢測姓名：萬祖勇申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：朱宏平余嶺20051021華中科技大學(xué)碩士學(xué)位論文華中科技大學(xué)碩士學(xué)位論文IIAbstractUnderchangeableloadsinbadenvironmentalwkingconditionssomeaccidenteffectsstructuressuffervariousdamagesduringtheirlifetim

2、e.Thedamagesarenoteasilytobefoundfirstaccumulatedstagebystageevencausethewholestructuretobedestroyedatlast.Thustheresearchonstructuraldamagedetectionhasbecomeahottopicnowadaysbecomeanactivebranchofcivilengineering.Beingf

3、undedjointlybytheInnovativeFundingoftheMinistryofWaterResourcesofChina(No:SCX200318)theNationalNaturalScienceFoundationofChina(No.50378041)severalkeypointsareproposedinthisthesis.Firstsomedisadvantagesoftheconventionalpa

4、rticleswarmoptimization(PSO)algithmaredeterminedthenanimprovedparticleswarmoptimization(IPSO)algithmisproposedfinallyacomparativestudyonbothPSOIPSOalgithmhasbeenconductedfthestructuraldamagedetection.Firstinthisthesisthe

5、methodsofstructuraldamagedetectionwhichhavebeendevelopedduringlastdecadesaresummarized.Itcanbeseenthatthestructuraldamagedetectionoftencanbeconvertedintotheconstrainedoptimizationproblem.Thebackgroundthebasictheytheimpro

6、vementofthePSOalgithmarediscussedespeciallyftheprematureconvergenceproblem.thenanIPSOalgithmisproposedaimingtoincreasethediversityoftheparticlesduringthelastphaseofPSOtherebytoavoidlocalminimumtosomeextend.Asuitoffiveben

7、chmarkfunctionsareemployedtoevaluatetheIPSOalgithmincomparisonwiththeconventionalPSO.TheexperimentalresultsshowthattheIPSOalgithmissuperitotheconventionalPSOalgithm.BoththeconventionalPSOtheIPSOalgithmareappliedtostructu

8、raldamagedetection.Thenumericalsimulationswhichareclassifiedintosinglemultidamagewithseveralcasesrespectivelyofa2rigidframestructureshowthatthePSOalgithmisvalidfstructuraldamagedetectiontheIPSOalgithmismeeffectivethanthe

9、conventionalPSOalgithm.Threedifferentobjectivefunctionswhichcomprisingoffrequencyincompletemodelshapesarecarriedoutfevaluationoftheincompletionofmodelshapes.Theillustratedresultsshowthattheobjectivefunctionwithcodinatemo